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Biomedical subjects

J Hobbs

Publications and source records attributed to J Hobbs.

At least 37 records · Page 2Linked to original sources
PubMed1994

Publication productivity in academic family medicine departments.

BACKGROUND AND OBJECTIVES: The purpose of this study was to quantify research publication productivity of family medicine departments in selected family medicine and interdisciplinary journals. METHODS: A 5-year journal search was conducted to identify original research articles published by family medicine department faculty. Publication productivity of all departments was ranked, and regression analysis was used to identify predictors of publication productivity. RESULTS: The departments leading in publication productivity published more than 25 articles over the 5-year period. The number of faculty and mean dollar value of family medicine department establishment grants were the strongest predictors of publication productivity. When adjusted for departmental size, some departments were found to have high publication productivity per faculty member, even though total numbers of departmental publications were low in comparison to other departments. CONCLUSIONS: This study identified one way of comparing departments in terms of publication productivity. Large departments, and those with more developmental grant support, have the highest publication productivity.

Faculty, Medical↗
PubMed1991

The adult patient. The adult patient.

The stories told by these two individuals reflect considerable differences in background conditions, treatment protocol, career decisions, life experiences, and emotional perspectives. They represent a spectrum of variables found in caring for patients with clefts. The following conclusions can be drawn from the existing literature as well as from the patients interviewed: 1. Early intervention is critical; treatment should be completed as early as possible. 2. Adults with clefts who have speech problems during adolescence and even adulthood generally do not do as well as cleft patients who have not experienced major speech problems. 3. Despite well-trained social work and psychological support from the cleft palate team, patients really may not verbalize their innermost feelings about their condition. There may be self-imposed limitations of which SLPs are unaware. 4. Just because the patient has achieved satisfactory cosmetic, functional, and speech results does not necessarily mean the patient's emotional development has reached a satisfactory level of adjustment. 5. SLPs see patients only within the well-defined limits of the hospital or clinic setting. They are not seen in public, their job setting, or within the family constellation. 6. The effects of cultural biases and differences may not be readily apparent but may have considerable influence on patient adjustment, expectations, behavior, and overall ability to accept the condition. 7. Infancy and childhood provide a window of time during which all operations, dental procedures, and therapies should be accomplished. Many older children will reach a point at which they will choose to stop the process and refuse what we think are the final stages of treatment.

Adaptation, Psychological↗
PubMed1989

Number and anatomical distribution of incompetent thigh perforating veins.

Although incompetent thigh perforating veins are considered to be a common cause of recurrence of varicose veins after high saphenous ligation, the number and distribution of such incompetent veins have not been reported. The aim of the study was to determine the number and anatomical distribution of incompetent thigh perforating veins. Sixty-five limbs in 48 patients with varicose veins who were found to have incompetent thigh perforating veins on ascending deep to superficial venography were studied. In 80 per cent of patients one incompetent thigh perforating vein was found and in 20 per cent more than one was found. Concomitant incompetent calf perforating veins were found in 92 per cent of the limbs studied. The incompetent thigh perforating veins were found to occur anywhere in the thigh, from the upper edge of the patella to a few centimetres below the saphenofemoral junction. The majority (71 per cent) were found in the middle third of the thigh. All incompetent thigh perforating veins were communicating with the long saphenous vein, including those in five patients with incomplete stripping. The surgeon should be aware of incompetent thigh perforating veins which may be multiple and occur at any site on the medial aspect of the thigh.

Adult↗
PubMed1989

Intravascular lipoleiomyomatosis: a report of two cases.

Two cases of intravascular leiomyomatosis (IVL) with histologic features of a lipoleiomyoma (LPL) are reported. Both tumors arose from preexisting uterine leiomyomata. One tumor was found incidentally in a uterus removed for leiomyomata. The other tumor extended up the inferior vena cava into the right side of the heart and presented as a cardiac mass. Although LPL is considered to be a benign lesion, IVL recurs in approximately 10% of reported cases, and must be distinguished from low-grade endometrial stromal sarcoma and leiomyosarcoma with vascular invasion. The combination of features in these cases lends support to the theory that IVL may arise by intravascular extension of a preexisting leiomyoma.

Adult↗
PubMed1988

Disturbances in acid-base metabolism. Recognition in the office setting.

Determination of the appropriateness of the compensatory response is essential in evaluation of any acid-base disturbance. Adequate compensation supports the presence of a single acid-base event. Inadequate compensation may indicate that a second primary acid-base event is present or, in some circumstances, that time has been inadequate for maximal physiologic compensation. When acid-base disturbances are mixed, treatment of one disorder may unmask the full pH-altering potential of the second disorder. Close monitoring of patients at risk for the development of acid-base disorders permits detection of problems at a time when intervention may prevent serious complications. Relatively inexpensive and easy-to-use chemical analytic systems to assist early diagnosis are now present in many office-based laboratories.

Acid-Base Imbalance↗
PubMed1987

Selective immunodeficiency affecting staphylococcal response.

Eight patients with recurrent staphylococcal infections, necessitating up to 213 hospital admissions in one patient, gave normal results with the usual immunological investigations, including measurement of serum IgG and IgG2. In the staphylococcal inhibition test all showed persistently subnormal results, corrected by the addition of compatible normal plasma or normal IgG therapy for 6 months to 21 years, and one died from staphylococcal septicaemia 6 months after withdrawal of treatment. The impairment in anti-staphylococcal response, with failure to produce adequate antibodies, was probably acquired in utero in four patients and inherited in two. In these six patients symptoms started soon after 4 months. In the remaining two the syndrome was acquired later in life.

Adult↗
PubMed1986

Office laboratory evaluation of fluid, electrolyte, and acid-base disorders.

Fluid, electrolyte, and acid-base disorders are common entities in office practice and usually require laboratory studies for complete evaluation. Many common studies (for example, dipstick urinalysis) that are ubiquitous to the office laboratory can provide significant preliminary information concerning the presence and nature of these disorders. New levels of precision in the evaluation of fluid, electrolyte, and acid-base disorders have recently been added to the office laboratory with the development of relatively inexpensive, reliable, and easy-to-operate chemical analytic systems. These systems now provide many studies conveniently to the office practice that once required the support of hospital or commercial laboratories.

Acid-Base Imbalance↗
PubMed1983

Clinically mild tularemia associated with tick-borne Francisella tularensis.

Between May 9 and July 3, 1979, 12 cases of glandular or ulceroglandular tularemia occurred in residents of the Crow Indian Reservation in southcentral Montana; only 13 cases had been reported from this geographic area in the preceding 25 years. The illness was mild, characterized by fever and cervical or occipital adenopathy. Systemic symptoms were self-limited although residual lymphadenopathy was common. Francisella tularensis was isolated from ticks (Dermacentor variabilis), the suspected vector. The strains of F tularensis did not ferment glycerol and thus were identified as type B rather than the more virulent type A. None of 83 adults hospitalized in an urban area 50 miles from the reservation had agglutination titers of antibody to F tularensis of greater than or equal to 1:40 compared with eight of 77 patients at the reservation hospital (P less than 0.01). Mild tularemia in reservation residents may have gone unrecognized; similar illness due to type B F tularensis may occur elsewhere.

Adult↗
PubMed1982

The influence of sterols on pentachlorophenol-induced charge transfer across lipid bilayers studied by alternating current methods.

The frequency dependence of membrane admittance has been determined for a series of phosphatidylcholine/sterol/n-decane bilayers in the presence of an aqueous environment containing pentachlorophenol. Variations in the results among membranes can be related to differences in the kinetic parameters of a kinetic model of pentachlorophenol-induced charge transport by characterizing both measurements and model behavior in terms of a common equivalent circuit. The kinetic model assumes a three-layer structure for the membrane and immediate environment. Data from membranes formed with beta-hydroxysterols having a flat ring structure and an intact side-chain (cholestanol, cholesterol, 7-dehydrocholesterol), after correction for sterol-induced membrane thinning, suggest that these sterols affect charge translocation by altering both interior fluidity and surface dipolar fields. The effects almost cancel for the case of cholesterol. These sterols also affect interfacial processes, either by inhibiting proton exchange between the aqueous and lipid environments, or by suppressing the adsorption of pentachlorophenol anions. Stigmasterol, coprostanol and epicholesterol cause only minor alterations in both translocation and interfacial processes. None of the sterols investigated has a significant influence on the capacitance of the interfacial region.

Animals↗
PubMed1982

Ultrastructural localization of substance P immunoreactivity in the ventral horn of the rat spinal cord.

At the light microscope level, the minute concentrations of substance P (SP) in rat spinal ventral horn can be visualized best by amplification with the double bridge PAP method of Vacca et al. (1975; 1980) in 5 microns paraffin tissue sections. Morphologically, the immunoreactive sites resemble punctate bodies. They occur in close apposition with the large ventral horn cells and their associated neuronal processes. By the Sternberger PAP procedure, we now describe these punctate bodies at the electron microscope level. Ultrastructurally, they appear as tiny boutons (terminal and preterminal) and small unmyelinated processes. The boutons and processes typically contain one to several immunolabeled dense core vesicles among many immunolabeled clear vesicles. They range in size near the limit of resolution of the light microscope (LM), thereby justifying further the use of LM amplification staining by the double bridge method. The immunolabeled boutons often synapse with large smooth dendrites (which may originate from motoneurons) by asymmetrical or symmetrical synaptic densities. Their synaptic densities appear immunostained as well. The data support the view that the electrophysiological action of SP in the ventral horn occurs in part by synaptic action along the processes of the ventral horn cells. Other mechanisms of action are considered for the peptide as well. Additional types of membrane specializations (synaptoid junctions) and SP neural circuits are described below.

Animals↗
PubMed1981

Metabolic acidosis.

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Acid-Base Equilibrium↗
PubMed1980

Interferon induction by two 2'-modified double-helical RNAs, poly(2'-fluoro-2'-deoxyinosinic acid) x poly(cytidylic acid) and poly(2'-chloro-2'-deoxyinosinic acid) x poly(cytidylic acid).

In addition to the 2'-azido analogue of (I)n x (C)n, (dIn3)n x (C)n, we have found two other (I)n x (C)n analogues, (dIfl)n x (C)n and (dIcl)n x (C)n, in which the 2'-hydroxyls of the (I)n strand are replaced by either fluorine or chlorine, to be highly effective in inducing interferon. This contrasted with the lack of interferon-inducing activity noted for various other 2'-halogeno analogues of (I)n x (C)n and (A)n x (U)n, i.e. (I)n x (dCcl)n, (dAfl)n x (U)n, (dAcl)n x (U)n, (A)n x (dUfl)n and (A)n x (dUcl)n. In most assay systems, viz. primary rabbit kidney cells, human diploid fibroblasts, HeLa cells, interferon-primed mouse L-929 cells, and intact rabbits, (dIfl)n x (C)n and (dIcl)n x (C)n induced interferon levels that were comparable to those induced by (I)n x (C)n. There was one particular system (L-929 cells treated with DEAE-dextran), however, in which (dIfl)n x (C)n and (dIcl)n x (C)n, unlike (I)n x (C)n, failed to stimulate interferon production. As monitored by both radiochemical and biological means, (dIfl)n x (C)n and, to a lesser extent, (dIcl)n x (C)n were more resistant to degradation by ribonuclease A, T1 and human serum nucleases than was (I)n x (C)n. In their reactivity towards antibodies to double-stranded RNA (dIfl)n x (C)n and (dIcl)n x (C)n conformed more closely to (I)n x (C)n than did other 2'-substituted (e.g. 2'-O-methyl or 2'-O-ethyl) analogues of (I)n x (C)n. The high interferon-inducing potency of (dIfl)n x (C)n and (dIcl)n x (C)n has both theoretical and practical implications. While our findings suggest that (dIfl)n x (C)n and (dIcl)n x (C)n should be further explored for their therapeutic potentials, they also strengthen the notion that the interferon-inducing capacity, and possibly other biological functions of double-stranded RNAs is dependent on the recognition of the overall conformation of the polynucleotide rather than on the binding of specific functional groups such as the 2'-hydroxyl group.

Animals↗
PubMed1979

Mitral valve prolapse.

Mitral valve prolapse is a relatively common condition in the general population. The syndrome appears more common in females, and is often associated with a family history. Patients may be asymptomatic or may present with a variety of symptoms ranging from mild chest aches and anxiety to severe angina-like chest pain, palpitations and dizziness. The common auscultatory features include mid-systolic clicks and a late systolic murmur, either alone or in combination. The wide spectrum of symptoms and signs may be explained by ventriculovalvular disproportion, where either the ventricle is too small for the valve, or the valve is too large for the ventricle. The long-term prognosis is very good; severe mitral regurgitation can occasionally develop, but both sudden death and bacterial endocarditis are rare. No treatment is required for asymptomatic patients, beyond antibiotic cover for dental procedures and surgery.

Adolescent↗